#ifndef RANDOM_H#define RANDOM_H#include <algorithm>#include <vector>#include <cstdlib>using namespace std;class Random {private:  /* constants for a pseudo-random number generator,      for details see numerical recipes in C   */  static const int IA = 16807;  static const int IM = 2147483647;  static const double AM = (1.0/IM);  static const int IQ = 127773;  static const int IR = 2836;    double ran01(long *idum);public:  Random(const int& arg) : seed(arg) {}  long int seed;  double next() { return ran01(&seed);}  /*          FUNCTION:      generates a random vector, quick and dirty      INPUT:         vector dimension      OUTPUT:        returns pointer to vector,                      free memory after using the vector      (SIDE)EFFECTS: none  */  long int* generate_array(const int & size);  /*   * alternative   */  vector<long int> generate_random_vector(const int& size ) {    vector<long int> V(size);    generate(V.begin(), V.end(), rand);    return V;  }};#endif